Regenerator chamber



J. H. GRAY.

REGENERATOB CHAMBER. 7 APPLICATION FILED JUNE 15,1921.

1 ,408,086 Patented Feb. 28, 1922.

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. NQQ N IN VE N TOR Jaqea/i 5mg fizz/2, A TORNEY J'. H. GRAY.

REGENEBATOR CHAMBER. APPLICATION FILED JUNE15, 1921.

Patented Feb. 28, 1922.

2 SHEETS-SHEET 2- IN VEN TOR Jamw/f. Gray I will."

{44 4/4 TTORNE Y ,uulrEo STATES,

n. GRAY, or new YORK, 1:. Y.

Rmmmma 011mm.

Specification of Letters Batent.

Patented Feb. 28. 1922.

Application filed June 15, ,1921. Serial No. 477,766. I X

To allwhom'z't'ma concern:

Be it known t at I 'J AMES H. GRAY, a citizen of the United tates, residinginthe city, county, and State of New'York, have invented certain new and useful Imp-rovements in Regenerator Chambers, of which i the following is aspecification.

My invent on aims to-provide certain improvements 1n regenerator chambers for metallurgical furnaces and particularly for open hearth steel furnaces.

The accompanyin drawings illustrate an embodiment of the lnventionj Fig. 1 is a horizontal section of a regenerator chamber with a dust catcher and passages leading from the furnace;

Figs. 2 and 3 are vertical sections on the line 22 and 3--3 of Fig.1 respectively.

Referring to the embodiment of the invention illustrated, an upright flue 1 communicates at its upper end with the furnace for conveying thereto air, whichhas been preheated in the regenerator, or for convey- .ing the gases of combustion from the furnace to the regenerator.

'At the lower end of the flue 1 is a slag pocket 2 having at its end a bridge wall 3 over the top of which the gases pass (usually directly to the regenerator). In the present case the gases pass over the bridge wall through a port 4 to a channel which passes around the outside of the regenerator, this channel comprising an oblique side 5 and longitudinal and transverse passages 6,

7 and 8 respectively, the latter communicating at its upper portionwith a port 9 over angular internal corners.

a bridge wall 10 leading directly to the regenerator. The regenerator proper is enclosed within a wall composed of parts 11, 12, 13 and 14 having rounded corners, while outside of the adjacent passages the walls carried therein in the pocket 2. The re-.

maining gas passing through the port 4 is drawn through the passages 5, 6, 7 and 8 I derived with a centrifugal effect which isparticularly emphasized at' the corners where there 1s an abrupt 'changein direction so that the dust from the gases is deposited largely. in

hese corners, whence it can be drawn out through suitable openings on a level with the floor of these passages; The air enters the dust separatingpassage at the top and leaves it at the top so that/there is little or no tendency to carry along with it the dust .which has once been separated and. fallen to the floor. I

It was formerly almost universal practice to use for fuelin open hearth furnaces and other regenerative heating furnaces, a gas rom coal,'gasified in gas producers.

To obtain intense combustion and high temperature, it was necessary to heat the gas as well 'asthe air in regenerative chambers before burning. .For this purpose, two regenerative chambers were provided at both ends of the furnace, one chamber to heat the air and theother to heat the gas. These chambers usually lay parallel to each other, being separated b a Wall or walls, the air chamber being 0 about twice the cubical content of the gas chamber.

At the present time, fuels are being used in regenerative furnaces which do not need to be heated in regenerative chambers, for instance, by-product coke oven gas, oil, tar, pulverized coal, etc. Consequently, there are in existence a large number of furnaces provided with double chambers and giving an excess heating area as regards the air alone. In such furnaces, I throw the two chambers together by removing the separating wall or Walls, and thus I utilize space equivalent to the gas chamber for the passages 5, 6, '7 and 8, and retain the same amount of checker brick as before, for heating the air. In most installations of furnaces, the floor space available for the putting down of regenerative chambers is limited.

My improvement, therefore, is particularly adapted for furnaces using fuel which does not require preheating, and provides a combined regenerator and separator within' a-space no greater than that which has P NT FFI E heretofore been used for gas and air regenerators in the old style furnaces. The hot airpassing around the regenerator also transmits heat thereto through the interior walls of the dust separatin passages.

Though I have describe with great particularity ofdetail a specific embodiment of my invention, yet it is not to be understood therefrom that the invention is restricted to the particular embodiment disclosed. Various modifications thereof in detail and in the arrangement of the parts may be made by those skilled in the art without deparmm from the invention as defined in the followin claims.

What claim is z 1. A regenerator for metallurgical furnaces having a surrounding passage for the gas coming from the furnace to the regen ator in which dust is separated by centrifugal action, said passage having an admisslon port and a discharge port for the gases,

both of which are above the floor of the passage.

4. A regenerative metallurgical furnacepreheat the air but not the fuel adapted to for combustion and havin an air regenerator and a dust separating passage surrounding said regenerator.

5. A regenerative metallurgical furnace adapted to preheat the air but not the fuel for combustion and having an air regenerator and a dust separating passage alon a the two sides and around the outer end wall of said regenerator.

6. A regenerative metallurgical furnace. adapted to preheat the air but not the fuel for combustion and having an air regenerator with vertical passages therethrough and a dust separating passage extending. along a slde wall of said regenerator.

In witness whereof, I have hereunto signed my name.

. JAMES H. GRAY. 

